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  <title>Returns an array of resources representing the fields in a result set</title>
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  <div id="layout-content"><div id="function.maxdb-fetch-fields" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">maxdb_fetch_fields</h1>
  <h1 class="refname">maxdb_result::fetch_fields</h1>
  <p class="verinfo">(PECL maxdb &gt;= 1.0)</p><p class="refpurpose"><span class="refname">maxdb_fetch_fields</span> -- <span class="refname">maxdb_result::fetch_fields</span> &mdash; <span class="dc-title">Returns an array of resources representing the fields in a result set</span></p>

 </div>

 <div class="refsect1 description" id="refsect1-function.maxdb-fetch-fields-description">
  <h3 class="title">说明</h3>
  <p class="para">过程化风格</p>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>maxdb_fetch_fields</strong></span>
    ( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$result</code></span>
   ) : <span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span></div>

  <p class="para rdfs-comment">面向对象风格</p>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>maxdb_result::fetch_fields</strong></span>
    ( <span class="methodparam">void</span>
   ) : <span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span></div>

  <p class="para rdfs-comment">
   This function serves an identical purpose to the <span class="function"><a href="maxdb_fetch_field.html" class="function">maxdb_fetch_field()</a></span>
   function with the single difference that, instead of returning one resource at a time for
   each field, the columns are returned as an array of resources.
  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.maxdb-fetch-fields-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   Returns an array of resources which contains field definition information or <strong><code>FALSE</code></strong> if no field information
   is available.
  </p>
  <p class="para">
  <table class="doctable table">
   <caption><strong>Object properties</strong></caption>
   
    <thead>
     <tr>
      <th>Property</th>
      <th>Description</th>
     </tr>

    </thead>

    <tbody class="tbody">
     <tr>
      <td>name</td>
      <td>The name of the column</td>
     </tr>

     <tr>
      <td>max_length</td>
      <td>The maximum width of the field for the result set.</td>
     </tr>

     <tr>
      <td>type</td>
      <td>The data type used for this field</td>
     </tr>

     <tr>
      <td>decimals</td>
      <td>The number of decimals used (for integer fields)</td>
     </tr>

    </tbody>
   
  </table>

  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-function.maxdb-fetch-fields-examples">
  <h3 class="title">范例</h3>
  <div class="example" id="example-1351">
   <p><strong>Example #1 面向对象风格</strong></p>
   <div class="example-contents">
<div class="phpcode"><pre><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />$maxdb&nbsp;</span><span style="color: #007700">=&nbsp;new&nbsp;</span><span style="color: #0000BB">maxdb</span><span style="color: #007700">(</span><span style="color: #DD0000">"localhost"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"MONA"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"RED"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"DEMODB"</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/*&nbsp;check&nbsp;connection&nbsp;*/<br /></span><span style="color: #007700">if&nbsp;(</span><span style="color: #0000BB">maxdb_connect_errno</span><span style="color: #007700">())&nbsp;{<br />&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"Connect&nbsp;failed:&nbsp;%s\n"</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">maxdb_connect_error</span><span style="color: #007700">());<br />&nbsp;&nbsp;&nbsp;exit();<br />}<br /><br /></span><span style="color: #0000BB">$query&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #DD0000">"SELECT&nbsp;name,&nbsp;cno&nbsp;from&nbsp;hotel.customer&nbsp;ORDER&nbsp;BY&nbsp;cno"</span><span style="color: #007700">;<br /><br />if&nbsp;(</span><span style="color: #0000BB">$result&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">$maxdb</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">query</span><span style="color: #007700">(</span><span style="color: #0000BB">$query</span><span style="color: #007700">))&nbsp;{<br /><br />&nbsp;&nbsp;&nbsp;</span><span style="color: #FF8000">/*&nbsp;Get&nbsp;field&nbsp;information&nbsp;for&nbsp;all&nbsp;columns&nbsp;*/<br />&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">$finfo&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">$result</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">fetch_fields</span><span style="color: #007700">();<br /><br />&nbsp;&nbsp;&nbsp;foreach&nbsp;(</span><span style="color: #0000BB">$finfo&nbsp;</span><span style="color: #007700">as&nbsp;</span><span style="color: #0000BB">$val</span><span style="color: #007700">)&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"Name:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;%s\n"</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$val</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">name</span><span style="color: #007700">);<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"Table:&nbsp;&nbsp;&nbsp;&nbsp;%s\n"</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$val</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">table</span><span style="color: #007700">);<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"max.&nbsp;Len:&nbsp;%d\n"</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$val</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">max_length</span><span style="color: #007700">);<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"Flags:&nbsp;&nbsp;&nbsp;&nbsp;%d\n"</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$val</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">flags</span><span style="color: #007700">);<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"Type:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;%d\n\n"</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$val</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">type</span><span style="color: #007700">);<br />&nbsp;&nbsp;&nbsp;}<br />&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">$result</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">close</span><span style="color: #007700">();<br />}<br /><br /></span><span style="color: #FF8000">/*&nbsp;close&nbsp;connection&nbsp;*/<br /></span><span style="color: #0000BB">$maxdb</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">close</span><span style="color: #007700">();<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</pre></div>
   </div>

  </div>
  <div class="example" id="example-1352">
   <p><strong>Example #2 过程化风格</strong></p>
   <div class="example-contents">
<div class="phpcode"><pre><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />$link&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">maxdb_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">"localhost"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"MONA"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"RED"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"DEMODB"</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/*&nbsp;check&nbsp;connection&nbsp;*/<br /></span><span style="color: #007700">if&nbsp;(</span><span style="color: #0000BB">maxdb_connect_errno</span><span style="color: #007700">())&nbsp;{<br />&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"Connect&nbsp;failed:&nbsp;%s\n"</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">maxdb_connect_error</span><span style="color: #007700">());<br />&nbsp;&nbsp;&nbsp;exit();<br />}<br /><br /></span><span style="color: #0000BB">$query&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #DD0000">"SELECT&nbsp;name,&nbsp;cno&nbsp;from&nbsp;hotel.customer&nbsp;ORDER&nbsp;BY&nbsp;cno"</span><span style="color: #007700">;<br /><br />if&nbsp;(</span><span style="color: #0000BB">$result&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">maxdb_query</span><span style="color: #007700">(</span><span style="color: #0000BB">$link</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$query</span><span style="color: #007700">))&nbsp;{<br /><br />&nbsp;&nbsp;&nbsp;</span><span style="color: #FF8000">/*&nbsp;Get&nbsp;field&nbsp;information&nbsp;for&nbsp;all&nbsp;columns&nbsp;*/<br />&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">$finfo&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">maxdb_fetch_fields</span><span style="color: #007700">(</span><span style="color: #0000BB">$result</span><span style="color: #007700">);<br /><br />&nbsp;&nbsp;&nbsp;foreach&nbsp;(</span><span style="color: #0000BB">$finfo&nbsp;</span><span style="color: #007700">as&nbsp;</span><span style="color: #0000BB">$val</span><span style="color: #007700">)&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"Name:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;%s\n"</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$val</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">name</span><span style="color: #007700">);<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"Table:&nbsp;&nbsp;&nbsp;&nbsp;%s\n"</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$val</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">table</span><span style="color: #007700">);<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"max.&nbsp;Len:&nbsp;%d\n"</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$val</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">max_length</span><span style="color: #007700">);<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"Flags:&nbsp;&nbsp;&nbsp;&nbsp;%d\n"</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$val</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">flags</span><span style="color: #007700">);<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"Type:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;%d\n\n"</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$val</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">type</span><span style="color: #007700">);<br />&nbsp;&nbsp;&nbsp;}<br />&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">maxdb_free_result</span><span style="color: #007700">(</span><span style="color: #0000BB">$result</span><span style="color: #007700">);<br />}<br /><br /></span><span style="color: #FF8000">/*&nbsp;close&nbsp;connection&nbsp;*/<br /></span><span style="color: #0000BB">maxdb_close</span><span style="color: #007700">(</span><span style="color: #0000BB">$link</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</pre></div>
   </div>

  </div>
  <p class="para">以上例程的输出类似于：</p>
  <div class="example-contents screen">
<div class="cdata"><pre>
Name:     NAME
Table:
max. Len: 10
Flags:    -1
Type:     2

Name:     CNO
Table:
max. Len: 4
Flags:    -1
Type:     0
</pre></div>
  </div>
 </div>


 <div class="refsect1 seealso" id="refsect1-function.maxdb-fetch-fields-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="maxdb_num_fields.html" class="function" rel="rdfs-seeAlso">maxdb_num_fields()</a> - Get the number of fields in a result</span></li>
    <li class="member"><span class="function"><a href="maxdb_fetch_field.html" class="function" rel="rdfs-seeAlso">maxdb_fetch_field()</a> - Returns the next field in the result set</span></li>
    <li class="member"><span class="function"><a href="maxdb_fetch_field_direct.html" class="function" rel="rdfs-seeAlso">maxdb_fetch_field_direct()</a> - Fetch meta-data for a single field</span></li>
   </ul>
  </p>
 </div>


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